Tuning the Ion-Selectivity of Thin-Film Composite Nanofiltration Membranes by Molecular Layer Deposition of Alucone

Chaudhury, Sanhita; Wormser, Eyal Merary; Harari, Yuval Noah; Edri, Eran; Nir, Oded

doi:10.1021/acsami.0c16569

Cited by 24 publications

(18 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The prototype process is the one with TMA and EG. [ 111,231,287–332 ] However, TMA works very well with many other organics as well. [ 40,46,54,108,109,114,125,148,211–213,218,219,221,226,228,230,234,240,244,245,249,252,255,256,258,260,262,264,267–269,273–277,279–284,325,333–369 ] The bulkier dimethyl aluminum isopropoxide precursor has been successfully used with EG as well.…”

Section: Brief Account Of Ald/mld Processes Developedmentioning

confidence: 99%

Atomic/Molecular Layer Deposition for Designer's Functional Metal–Organic Materials

Multia

Karppinen

2022

Adv Materials Inter

View full text Add to dashboard Cite

organic ligands act as bridges between the metal centers to form infinite 1D, 2D, or 3D structures. These materials are often referred to as coordination polymer (CP) [1] or metal-organic framework (MOF) [2] materials; the latter term is used when the metal-organic material is crystalline and highly porous. [3] The research field of CP-and MOF-type materials has grown tremendously over the last two decades. The structural and chemical diversity of these materials has served as a continuous source of scientific excitement; the same diversity has also triggered huge technological interest as these materials possess enormous potential to be tailored for a wide variety of applications ranging from gas capture, storage, and separation to sensing, catalysis, optics, electronics, and energy storage. [4][5][6][7] Most of the targeted application breakthroughs of metal-organics require that these materials can be produced as highquality thin films and coatings, which can be integrated with the other components in the actual device configuration. The possibility to deposit such thin films in an industry-feasible manner on the substrate types needed, would be a major step forward in the field. [8] Traditionally, solvent-based processes such as liquid-phase epitaxy, Langmuir-Blodgett, layer-by-layer, and electrochemical deposition techniques have been used for metal-organic thin films. [9][10][11] These are, however, incompatible with the requirements set by the possible integration of the materials in microelectronics. This is due to corrosion and contamination risks, and the problems in patterning and precise deposition on high-aspect-ratio features. Hence, it is vital to develop solventfree thin-film deposition routes for the metal-organic material family. In the optimal case, these deposition methods should allow conformal coatings on large-area and high-aspect-ratio substrates.The currently strongly emerging ALD/MLD technique is uniquely suited to address the challenge in a scientifically elegant yet industrially feasible way. This technique is derived from the two parent gas-phase thin-film techniques: ALD for inorganic materials (mostly binary metal oxides, sulfides, and nitrides), [12][13][14] and its counterpart MLD for purely organic thin films (e.g., polyimides and polyamides). [15] In both cases, the attractive film growth characteristics are derived from the unique way of separating the different precursor gas pulses. Currently, ALD is the standard thin-film technology in many Atomic layer deposition (ALD) for high-quality conformal inorganic thin films is one of the cornerstones of modern microelectronics, while molecular layer deposition (MLD) is its less-exploited counterpart for purely organic thin films. Currently, the hybrid of these two techniques, i.e., ALD/MLD, is strongly emerging as a state-of-the-art gas-phase route for designer's metal-organic thin films, e.g., for the next-generation energy technologies. The ALD/MLD literature comprises nearly 300 original journal papers covering most of the alkali...

show abstract

Section: Brief Account Of Ald/mld Processes Developedmentioning

confidence: 99%

Atomic/Molecular Layer Deposition for Designer's Functional Metal–Organic Materials

Multia

Karppinen

2022

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…Molecular layer deposition (MLD), [35,36] the organic analogy of ALD, similarly provides precise control over the coating thickness and composition in a conformal growth [37,38] . While the ALD processes are usually limited to inorganic metal‐oxides/nitrides/sulfides/phosphate and metal‐films, the MLD can produce pure polymeric thin films and hybrid organic‐inorganic thin films of organic ligand linked by metal ion linker [39–44] . Previous works have described the MLD of different hybrid organic‐inorganic thin films using precursors of diethyl zinc (DEZn) or trimethylaluminum (TMA) as the sources for metal layer, and hydroquinone(HQ), ethylene glycol (EG) or their derivatives as the organic precursors [45–52] .…”

Section: Introductionmentioning

confidence: 99%

Molecular Layer Deposition of Alucone Thin Film on LiCoO₂ to Enable High Voltage Operation

Lidor‐Shalev

Leifer

Ejgenberg

et al. 2021

Batteries & Supercaps

View full text Add to dashboard Cite

Extracting the theoretically high capacity of LiCoO2 (LCO) is desirable for enhancing the energy density of currently used lithium‐ion batteries (LIBs) for portable devices. The bottleneck for exhibiting the high capacity is associated with the limited cut‐off positive voltages beyond which degradation of electrode/electrolyte takes place. In this work, we apply hybrid organic‐inorganic alucone thin film grown directly on LCO by a molecular layer deposition (MLD) method, using sequential exposure to Al‐based and organic‐based precursors. The alucone thin films enabled the high voltage operation of the LCO cathode (>4.5 V), acting as a protection layer. Electrochemical studies proved that alucone coated LCO show enhanced electrochemical performances with improved cycling stability and enhanced specific capacity, relative to uncoated LCO. Amongst the studied films, 10 nm ethylene glycol/Al coated LCO have shown the best results.

show abstract

“…It can be clearly seen that the Na + /X 2+ selectivities of PEM-based membranes are higher than those of commercial NF membranes, such as the popular DOW N90 [122] and NF270 [123], while retaining good water permeabilities. Clearly, PEM assembly is an attractive surface modification which allows for outstanding mono-/divalent ion selectivity also compared to the competing surface modifications [122][123][124][125][126][127][128][129].…”

Section: Specific Selectivitymentioning

confidence: 98%

“…In Figure 2.4b, PEM-coated membranes [118][119][120][121] are directly compared to commercial NF membranes and to NF membranes prepared by other modification techniques, such as polymer grafting [122], atomic and molecular layer deposition [124,125], graphene oxide [127], and carbon nanotubes incorporation [126]. It can be clearly seen that the Na + /X 2+ selectivities of PEM-based membranes are higher than those of commercial NF membranes, such as the popular DOW N90 [122] and NF270 [123], while retaining good water permeabilities. Clearly, PEM assembly is an attractive surface modification which allows for outstanding mono-/divalent ion selectivity also compared to the competing surface modifications [122][123][124][125][126][127][128][129].…”

Section: Specific Selectivitymentioning

confidence: 99%

“…(b) Comparison of membrane divalent ion-selectivity (Na+ /X 2+ ) and water permeability (L•m −2 •h −1 •bar −1 )as a function of different surface modifications from literature. Green diamonds represent single data points for PEM-coated nanofiltration (NF) membranes[118][119][120][121], purple triangles modified NF membranes[122][123][124][125][126][127][128][129], and blue circles commercial NF membranes[119,122,123]. (c) Permeability vs. micropollutant retention and (d) sodium chloride retention vs. micropollutant retention for asymmetric and symmetric PEM-coated membranes in comparison with commercial NF and reverse osmosis (RO) membranes.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Complex, indeed : polyelectrolyte-based membranes via aqueous phase separation

Durmaz

View full text Add to dashboard Cite

iii applications, however, these membranes not being mechanically stable enough for filtration tests emphasizes the importance of the selection of PEs for material and membrane properties.In order to obtain PEC membranes with the pH-switch approach, at least one of the PEs must be a weakly charged one. This allows one to control the charges of the PE with pH and to obtain homogeneous casting solutions. In Chapter 5, it is shown that complexation-induced APS is not limited to pairs with one weak PE. Here, the salinity-switch approach is discussed for membranes prepared with two strong PEs, PSS and PDADMAC. Tuning the ionic strength allows control over complex formation by screening the PE charges. Homogeneous casting solutions are obtained by mixing these PEs at high NaCl concentrations and membrane formation is triggered by coagulation baths at low salinity. This approach not only permits the preparation of membranes with any polyanion-polycation pair, but it also provides much milder conditions for membrane formation than the earlier discussed extreme pH changes. The chapter starts with a discussion on the optimum casting solution properties for this PE pair where 200 kDa PSS and 15.4 wt% PE concentration are considered to be the best working condition. In the second part of the chapter, the effect of coagulation bath salinity is investigated. Increasing the salt concentration in the coagulation bath hinders the diffusion of salt from the casting solution to the bath which gives membranes with different structures. Increasing salt concentration increases the skin layer thickness which is inversely proportional to pure water permeance values. All membranes obtained in this chapter are suitable for nanofiltration applications. They have < 300 Da molecular weight cut-off and approximately 80% MgSO₄ retention, in addition, these membranes are stable against 10 bar transmembrane pressure for aqueous filtrations and maintain their integrity at pH conditions such as pH 0 and pH 14 for 40 days.Chapter 6 is a continuation of the investigation on the PSS-PDADMAC pair and it is focused on the effect of PE monomer ratio on membrane charge. PSS to PDADMAC monomer ratio is varied between 1.0:0.8 to 1.0:1.2. All membranes were of asymmetric type and they can be utilized for nanofiltration applications with below 400 Da molecular weight cut-off. Permeance values are approximately 1 L•m −2 •h −1 •bar −1 except the membrane prepared with 1.0:1.2 ratio solution which has more than 20 L•m −2 •h −1 •bar −1 permeance. Both positively and negatively charged membranes were obtained depending on the mixing ratio, which is reported for the first time in literature. There is a tendency for PSS-PDADMAC complexes to be positively charged as often reported. Salt type is very crucial for PECs due to the fact that it alters both the doping degree of the PEC and the mass transfer during phase separation (i.e. salt and PE diffusion). Therefore, it is hypothesized that the NaCl used here allows for the formation of negatively charged membranes un...

show abstract

Tuning the Ion-Selectivity of Thin-Film Composite Nanofiltration Membranes by Molecular Layer Deposition of Alucone

Cited by 24 publications

References 55 publications

Atomic/Molecular Layer Deposition for Designer's Functional Metal–Organic Materials

Atomic/Molecular Layer Deposition for Designer's Functional Metal–Organic Materials

Molecular Layer Deposition of Alucone Thin Film on LiCoO₂ to Enable High Voltage Operation

Complex, indeed : polyelectrolyte-based membranes via aqueous phase separation

Contact Info

Product

Resources

About

Tuning the Ion-Selectivity of Thin-Film Composite Nanofiltration Membranes by Molecular Layer Deposition of Alucone

Cited by 24 publications

References 55 publications

Atomic/Molecular Layer Deposition for Designer's Functional Metal–Organic Materials

Atomic/Molecular Layer Deposition for Designer's Functional Metal–Organic Materials

Molecular Layer Deposition of Alucone Thin Film on LiCoO2 to Enable High Voltage Operation

Complex, indeed : polyelectrolyte-based membranes via aqueous phase separation

Contact Info

Product

Resources

About

Molecular Layer Deposition of Alucone Thin Film on LiCoO₂ to Enable High Voltage Operation